Rinnai Tankless Water Heater R94LSi Review

Rinnai R94LSi Natural Gas Indoor Tankless Water Heater

Overall Rating:

Available on Amazon for $1,371.00

Rinnai R94LSi Natural Gas Indoor Tankless Water Heater meets strict California and Texas NOx Emissions Standards; Certified for Installation in Manufactured (Mobile) Homes. As all Rinnai tankless units, it is easy to service and troubleshoot.

Rinnai R94LSi Natural Gas Indoor Tankless Water Heater

Overview of the Rinnai R94LSi Tankless Water Heater:

Rinnai tankless water heater r94lsi allows you to enjoy endless hot water for up to five plumbing and appliance outlets simultaneously. The hot water will always be at a consistent, pre-set temperature. This 84% efficiency tankless water heater has a capacity of up to 9.4 gallons of hot water per minute.

You will not only save money on your energy bills with this tankless unit, but there will also be no more late-night showers because your kids had used all the hot water before going to bed. You would be able to use hot water any time, as much as you want and need.

The heat exchanger and the construction of this unit are of commercial-grade, ensuring durability even for commercial use. Thanks to its sleek design, Rinnai r94lsi can be mounted in any room. It will not take much space at all.

Rinnai r94lsi tankless water heater has a concentric venting system that vents directly to the outside and it comes with an integrated condensate collector. You can make it vent directly to the outside either by a single wall or roof penetration.

Just like its cousin Rinnai R75Lsi, the r94lsi model comes with a commercial-grade heat exchanger and can be mounted anywhere as long as it is indoor.

This tankless water heater is great for:

  • People who want to use up to five plumbing and appliance outlets at the same time
  • Manufactured/mobile homes
  • People looking for commercial tankless water heater

Features of Rinnai R94LSi water heater:

  • Commercial-grade Heat Exchanger for Residential and Commercial Applications
  • Comes standard with MC-91-1US Digital Controller with Error Code Indicator
  • Pre-set at 120°F
  • EZConnect® (connects two units together)
  • Energy Factor of 0.82
  • Compatible with Full Line of Rinnai Digital Controllers
  • Temperature Range with Controllers: Residential (98°F – 140°F); Commercial (98°F – 185°F)
  • 12-Year Warranty on Heat Exchanger, 5 Year Parts, 1 Year Labor for Residential Installations

The temperature ranges from 98 degrees to 140 degrees using the included standard controller. Rinnai also offers a commercial controller that covers temperatures range from 98 degrees to 160 degrees.

This water heater is currently available on Amazon for $1,371.00.

The Pros:

Fairly easy to install with the help of a pro
Setting the temp to 125 and taking a bath is awesome
Great value for the price

The Cons:

Can be only installed indoor
“Coldwater sandwiches” are possible as with any tankless water heater (more frequent than with the tank-type ones).


Here is a helpful review from B. Thompson, who was very satisfied with this water heater:

I installed Rinnai R94LSi by myself. It shipped with everything I needed including the vent kit. I did all the electrical, plumbing and natural gas work myself. So far, the unit has provided enough hot water that we have never run out of water. We can do dishes, run the laundry and take a shower at the same time. My friend was so impressed that he ordered the same exact model. Our gas bill did go down slightly and we will get an energy star credit on our tax bill this year for the purchase price. Rinnai has a very satisfied customer here. (B. Thompson)

Here is another happy customer’s review we found on YouTube. It seems this buyer has installed the Rinnai R94LSi heater by himself. It shows that it can be done, but we do not recommend the DIY approach if you don’t have any plumbing skills.

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